Abstract:
A circuit board includes a copper plate and an insulating layer of photosensitive polyimide resin formed on the copper plate, the insulating layer leaving an exposed portion of a surface of the copper plate where an LSI is to be mounted. After Au plating is applied to the exposed surface of the copper plate, the LSI is mounted fixedly. A connection pattern having bonding pads is formed by copper plating on the insulating layer. The bonding pads and the LSI are connected by Au wire bonding on the Au plating applied on the bonding pads.
Abstract:
A waffeline-configured, surface-mount transmission line module contains a two-dimensional arrangement of periodically distributed conductive surface mesas and channels. Within the channels are segments of dielectrically surrounded conductor. The geometry of the arrangement of segments among the waffleline channels is defined in accordance with the intended signal coupling functionality of the interconnect structure. For example, in the case of a signal splitting application, the conductor segments may be arranged in a tree-like configuration between an input port and multiple output ports. Isolation resistors may be disposed within the channels of the waffleline between adjacent locations of diverging conductor runs among the mesas of the waffleline. The resulting transmission line module is then surface-mounted on the same printed wiring board as the signal processing components it is to interconnect, and respective portions of the segments of dielectrically surrounded conductor within the channels of the waffleline module are connected to signal ports of adjacent signal processing components. Because each waffleline interconnect module is relatively thin, multiple modules may be mounted in a stacked configuration on the printed wiring board to realize a three-dimensional waffleline module structure, with intermodule vias and interconnects provided between selected locations of conductor segments of adjacent layers.
Abstract:
A circuit board includes a copper plate and an insulating layer of photosensitive polyimide resin formed on the copper plate, the insulating layer leaving an exposed portion of a surface of the copper plate where an LSI is to be mounted. After Au plating is applied to the exposed surface of the copper plate, the LSI is mounted fixedly. A connection pattern having bonding pads is formed by copper plating on the insulating layer. The bonding pads and the LSI are connected by Au wire bonding on the Au plating applied on the bonding pads.
Abstract:
A composite printed circuit board having a metallic layer supporting body with a first insulating layer thereon and wherein the insulating layer has copper printed circuits placed thereon. The printed circuit board is adapted to precisely hold and position electric components (normally electrical motor sensors) on stamped out recesses in the composite body. The stamped out recesses have edge portions for finitely positioning the components and allow for electric leads coming from the components to pass over the bent tabular portion of the recess to be soldered to the copper circuits.
Abstract:
Electrical components (10 or 30) are fastened to a mounting surface (16) of a printed circuit board (11) by forming a plurality of thermoplastic pins (20, 35) projecting from the mounting surface of the board adjacent to positions where components are to be located. The component is placed on the board so that portions of the component are located adjacent to portions of the pins, following which portions of the pins are heated and formed about portions of the component to form plastic locking sections (22 or 37) that fasten the component to the board in a desired position. The mounting surface (16) of the board may be formed with a pocket (18 or 33) that receives and positions the component at the desired location, so that component leads (17 or 32) extend along the mounting surface to positions overlapping lead-contact areas (14, 34) of printed contact patterns deposited on the mounting surface, after which the leads are attached to the contact areas, as by reflow soldering.
Abstract:
A construction and method of fabricating a multiwafer electrical circuit structure comprised of a plurality of malleable electrically conductive wafers providing X, Y and Z coaxial connections. The wafers are stacked together under pressure with deformable integral malleable contacts being provided between adjacent wafers for providing wafer-to-wafer Z-axis electrical connections as well as wafer-to-wafer ground connections. The wafers are fabricated from conductive sheets of appropriate malleability in a manner so that the deformable integral malleable Z-axis and ground contacts required between adjacent wafers are fabricated directly from the wafer material.
Abstract:
A ceramic electronic component that includes an electronic component body having a superficial base ceramic layer; a surface electrode on a surface of the electronic component body, a peripheral section of the surface electrode having an opening therein; and a covering ceramic layer covering the peripheral section of the surface electrode and the opening therein.
Abstract:
One or more channels are provided in the surface of a conductive layer of a PCB substrate in an area on which a component is to be placed. The channels can help reduce or prevent shifting of the component during reflow soldering through surface tension/capillary forces of the solder paste material in the channels. Such channels also can be used, for example, by an image processing system to facilitate accurate positioning and/or alignment of the component. The image processing system can use the location of the channels alone, or in combination with other features such as a solder mask or other alignment marks, to position and/or align the component with high accuracy.
Abstract:
A chip substrate includes conductive portions, an insulation portion and a cavity. The conductive portions are laminated in one direction to constitute the chip substrate. The insulation portion is interposed between the conductive portions to electrically isolate the conductive portions. The cavity is formed on an upper surface of the chip substrate at a predetermined depth in a region including the insulation portion. The cavity is defined by a plurality of continuously-extending curved surfaces having predetermined radii of curvature.
Abstract:
A pre-soldered pre-fluxed electrical component or connector, which can protect the flux from wearing off the surface of solder during shipping and handling. The electrical component can include a terminal pad. A layer of solder can be on the terminal pad. The layer of solder can have a surface with a series of generally equally spaced apart flux wells formed in the surface of the solder for protectively storing and retaining flux therein. The flux wells can have a lateral dimension of at least 0.05 mm and a depth of at least 0.023 mm that is deep enough for retaining a quantity of flux therein when flux on the surface of the layer of solder wears off during shipping and/or handling.